Example uplink control information (uci) layer mapping

Patent metadata

Field	Value
Publication number	US-2020296742-A1
Application number	US-201816768102-A
Country	US
Kind code	A1
Filing date	Nov 28, 2018
Priority date	Nov 29, 2017
Publication date	Sep 17, 2020
Grant date	—

Abstract

Certain aspects of the present disclosure relate to methods and apparatus relating to UCI layer mapping. According to certain aspects, a mapping rule maps UCI to one or more layers of a physical uplink shared channel (PUSCH) transmission based on at least one of a rank of the PUSCH transmission or a modulation and coding scheme (MCS) of the PUSCH transmission.

First claim

What is claimed is:

1 . A method of wireless communication by a network entity, comprising:
identifying an uplink (UL) control information (UCI) to be included in a Physical Uplink Shared Channel (PUSCH) transmission; identifying at least one mapping rule that maps the UCI to one or more layers of the PUSCH transmission, wherein the at least one mapping rule is based on at least one of a rank of the PUSCH, or a modulation and coding scheme (MCS) of the PUSCH; and receiving a PUSCH from the UE containing at least the UCI using the at least one mapping rule.

2 . The method of claim 1 , wherein the at least one mapping rule comprises a mapping of the UCI to a fixed plurality of the layers of the PUSCH.

3 . The method of claim 1 , further comprising configuring the UE with the at least one mapping rule via at least one of radio resource control (RRC) signaling or a media access control (MAC) control element (CE).

4 . The method of claim 1 , further comprising configuring the UE with the at least one mapping rule via a downlink control information (DCI) transmission.

5 . The method of claim 1 , further comprising:
transmitting at least one of an indication of the rank of the PUSCH or an MCS indication to facilitate identification of the mapping by the UE.

6 . The method of claim 5 , wherein the rank of the PUSCH is indicated via at least one of an UL DMRS port indication, a transmit rank indication (TRI), or a sounding resource indication (SRI).

7 . The method of claim 5 , wherein the at least one mapping rule:
maps the UCI to a first set of one or more layers of the PUSCH if the rank is a first value; or maps the UCI to a second set of one or more layers of the PUSCH if the rank is a second value.

8 . The method of claim 7 , wherein the at least one mapping rule further:
maps the UCI to a third set of one or more layers of the PUSCH if the rank is above the second value.

9 . The method of claim 5 , wherein an indication of at least one of the MCS or rank of the PUSCH is conveyed via a downlink control information (DCI).

10 . The method of claim 1 , wherein the at least one mapping rule:
maps the UCI to a first set of one or more layers of the PUSCH if the MCS of the PUSCH is at or below a first MCS threshold; and maps the UCI to a second set of one or more layers of the PUSCH if the MCS of the PUSCH is above the first MCS threshold.

11 . The method of claim 10 , wherein:
the second set of one or more layers of the PUSCH comprises all layers of the PUSCH.

12 . The method of claim 10 , wherein the at least one mapping rule further:
maps the UCI to a third set of one or more layers of the PUSCH if the MCS is above a second MCS threshold.

13 . The method of claim 1 , wherein the at least one mapping rule is also based on UCI content, such that different UCI content is mapped differently.

14 . The method of claim 13 , wherein:
the UCI content comprises a CSI report with at least first and second parts; and the first and second parts of the CSI report are mapped to different sets of one or more layers.

15 . The method of claim 1 , wherein the at least one mapping rule is based on both MCS and rank of the PUSCH transmission.

16 . The method of claim 15 , wherein different combinations of MCS and rank of the PUSCH result in mapping the UCI to different sets of one or more layers.

17 . A method of wireless communication by a user equipment (UE), comprising:
identifying an uplink (UL) control information (UCI) to be transmitted to a network entity in a Physical Uplink Shared Channel (PUSCH) transmission; identifying at least one mapping rule that maps the UCI to one or more layers of the PUSCH transmission, wherein the mapping is based on at least one of a rank of the PUSCH, or a modulation and coding scheme (MCS) of the PUSCH; and transmitting a PUSCH to the network entity containing at least the UCI using the at least one mapping rule.

18 . The method of claim 17 , wherein the at least one mapping rule comprises a mapping of the UCI to a fixed plurality of the layers of the PUSCH.

19 . The method of claim 17 , further comprising receiving a configuration of the at least one mapping rule via at least one of radio resource control (RRC) signaling or a media access control (MAC) control element (CE).

20 . The method of claim 17 , further comprising receiving an indication of the at least one mapping rule via a downlink control information (DCI) transmission.

21 . The method of claim 17 , further comprising:
receiving, from the network entity, an indication of at least one of the rank of the PUSCH or the MCS of the PUSCH; and identifying the at least one mapping rule based on the indication.

22 . The method of claim 21 , wherein the rank of the PUSCH is indicated via at least one of an uplink (UL) demodulation reference signal (DMRS) port indication, a transmit rank indication (TRI), or a sounding resource indication (SRI).

23 . The method of claim 17 , wherein the at least one mapping rule:
maps the UCI to a first set of one or more layers of the PUSCH if the rank is a first value; and maps the UCI to a second set of one or more layers of the PUSCH if the rank is a second value.

24 . The method of claim 23 , wherein the at least one mapping rule further:
maps the UCI to a third set of one or more layers of the PUSCH if the rank is above the second value.

25 . The method of claim 17 , wherein an indication of at least one of the MCS or rank of the PUSCH is conveyed via a downlink control information (DCI).

26 . The method of claim 17 , wherein the at least one mapping rule:
maps the UCI to a first set of one or more layers of the PUSCH if the MCS of the PUSCH is at or below a first MCS threshold; and maps the UCI to a second set of one or more layers of the PUSCH if the MCS of the PUSCH is above the first MCS threshold.

27 . The method of claim 26 , wherein the second set of the one or more layers of the PUSCH comprises all layers of the PUSCH.

28 . The method of claim 26 , wherein the at least one mapping rule further:
maps the UCI to a third set of one or more layers of the PUSCH if the MCS is above a second MCS threshold.

29 . The method of claim 17 , wherein the at least one mapping rule is also based on UCI content, such that different UCI content is mapped differently further comprises a rule for.

30 . The method of claim 29 , wherein:
the UCI content comprises a CSI report with at least first and second parts; and the first and second parts of the CSI report are mapped to different sets of one or more layers.

31 . The method of claim 17 , wherein the at least one mapping rule is based on both MCS and rank of the PUSCH transmission.

32 . The method of claim 31 , wherein different combinations of MCS and rank of the PUSCH transmission result in mapping the UCI to different sets of one or more layers.

33 . An apparatus for wireless communication by a network entity, comprising:
means for identifying an uplink (UL) control information (UCI) to be included in a Physical Uplink Shared Channel (PUSCH) transmission; means for identifying at least one mapping rule that maps the UCI to one or more layers of the PUSCH transmission, wherein the at least one mapping

Assignees

• Hao Chenxi
• Zhang Yu
• Huang Yi
• Wu Liangming
• Chen Wanshi
• Manolakos Alexandros
• Qualcomm Inc

Inventors

• Hao Chenxi
• Zhang Yu
• Huang Yi
• Wu Liangming
• Chen Wanshi
• Manolakos Alexandros

Classifications

• H04W72/23

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H04W72/563

  of the wireless resources · CPC title

• H04L5/0053 Primary

  Allocation of signalling, i.e. of overhead other than pilot signals · CPC title

• H04W72/21

  in the uplink direction of a wireless link, i.e. towards the network · CPC title

• H04L1/0004

  applied to control information · CPC title